351mach11647545510 Posted December 4, 2012 Report Share Posted December 4, 2012 What would cause my tighten gas cap warning to come on and also keep shutting a gas pump off like the tank is full when its far from it Quote Link to comment Share on other sites More sharing options...
Cordell Posted December 4, 2012 Report Share Posted December 4, 2012 A vent solenoid that is stuck closed will cause issues like that with the fuel filling, and it doesn't make sense that it would say tighten gas cap unless it's just kicking some generic code as opposed to a specific code. Either way it sounds like the gas tank isn't venting. Quote Link to comment Share on other sites More sharing options...
Rocky31186 Posted December 4, 2012 Report Share Posted December 4, 2012 Sounds like you have more than one issue. Solenoid stuck and Evap hose/ line leaking. Sometimes they won't throw a Evap leak code. It will just say tighten gas cap. Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted December 4, 2012 Report Share Posted December 4, 2012 I had the same issues on my 2007 Silverado. Likely it's what Cordell said. We dropped the tank, replaced vent solenoid, that did the trick. Quote Link to comment Share on other sites More sharing options...
Cordell Posted December 4, 2012 Report Share Posted December 4, 2012 I had the same issues on my 2007 Silverado. Likely it's what Cordell said. We dropped the tank, replaced vent solenoid, that did the trick. Aren't very many vehicle that you would have to drop the tank on to get the vent solenoid. GM trucks you do not. Quote Link to comment Share on other sites More sharing options...
351mach11647545510 Posted December 4, 2012 Author Report Share Posted December 4, 2012 That's what I was thinking. Appreciate the insight Quote Link to comment Share on other sites More sharing options...
Geeesammy Posted December 4, 2012 Report Share Posted December 4, 2012 Aren't very many vehicle that you would have to drop the tank on to get the vent solenoid. GM trucks you do not. Well we were idiots and dropped it thinking something within the pump assembly or float was ruined causing these issues since my gas gauge was bouncing all over, but after consulting good we found out the true cause, didnt fix the gauge, but you are correct about not having to drop it, should have mentioned that. Quote Link to comment Share on other sites More sharing options...
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